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Reshaping of Distorted Signal with Low-Pass Type Negative Group Delay RL-network Circuit
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NETL
NSTL
Springer Nature
A signal reshaping method based-on the application of low-pass (LP) type negative group delay (NGD) of a resistive-inductive (RL) circuit is developed in this article. To enhance comprehension of the LP-NGD design, an analytical theory of the RL-network topology considered for the signal reshaping is developed using voltage transfer function exploration. The main NGD characteristics, such as time-advance, NGD value and NGD cut-off frequency are defined. Design equations for calculating resistors and inductors that constitute the RL topology are formulated based on the targeted time-advance. After printed circuit boards (PCB) designed from an expected -0.5 ms time advance, two proofs-of-concept (PoC) dedicated to two test signals are examined to validate the NGD application method. Time-domain simulations and measurements, which closely match with a 38 ms duration pulse signal, confirm the developed signal reshaping method's feasibility by improving the input-output signal fidelity assessed with correlation coefficient from 57 to 99%. For arbitrary waveform one, it is improved from 32.5 to 99%. The signal reshaping NGD method is particularly useful for improving electronic circuit board and sensor performances through signal integrity enhancement.
Low-pass (LP) negative group delay (NGD)NGD active circuitDesign methodExperimentationResistive-inductive (RL) network topologySignal reshapingTransient pulse signal
Yi Zhang、Xun Su、Robert Wieser、Raul Sanchez Galan、Blaise Ravelo
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Nanjing University of Information Science and Technology (NUIST), Nanjing 210044, Jiangsu, China
NETL
NSTL
Springer Nature
